USED OKUMA MB4000H – 2021

The OKUMA MB-4000H – 2021 is a high-speed CNC horizontal machining center designed for precision production machining, multi-sided machining, and automated manufacturing environments. Built around a compact 400 mm pallet platform, the MB-4000H combines rapid axis movement, thermal stability, high-speed spindle capability, and Okuma’s OSP CNC control. The machine is designed to perform milling, drilling, boring, and tapping operations while minimizing setups and improving spindle utilization.

The 2021 MB-4000H provides approximately 22.05 inches of X-axis travel, 22.05 inches of Y-axis travel, and 24.61 inches of Z-axis travel. It uses a 15.75″ x 15.75″ pallet and can accommodate workpieces up to approximately 23.62 inches in diameter and 35.43 inches in height, depending on configuration and interference limitations. The pallet has a maximum load capacity of approximately 880 pounds and can be equipped with full fourth-axis indexing.

A documented 2021 machine is configured with a 6-station pallet pool, 15,000 RPM CAT-40 Big Plus spindle, full fourth axis, and a 218-position matrix-style automatic tool changer. Additional equipment includes 1,000 PSI through-spindle coolant, Renishaw probing, Mayfran CONSEP 2000 chip conveyor, mist collector, shower coolant, splash gun, extended tool length capability, and six tombstones with fixture plates and workholding. Another documented 2021 configuration includes a 146-position tool changer and approximately 4,200 reported hours, showing that individual machine configurations can vary significantly.

The OKUMA MB-4000H is well suited for aerospace, automotive, medical, defense, hydraulic, energy, industrial machinery, and high-volume precision manufacturing. Its combination of horizontal machining, fourth-axis capability, pallet automation, high-speed spindle performance, and large tool storage makes it particularly valuable for manufacturers seeking extended unattended machining capability.

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OKUMA MB-4000H 2021 – AXIS

Specification	Details
Machine Type	CNC Horizontal Machining Center
Number of Axes	4
X-Axis Travel	22.05″
Y-Axis Travel	22.05″
Z-Axis Travel	24.61″
4th Axis	Full 4th Axis
Pallet Indexing	0.001°
CNC Control	OKUMA OSP-P300 / OSP-P300MA
Spindle Taper	CAT-40 Big Plus / Configuration Dependent
Spindle Speed	15,000 RPM
Automatic Tool Changer	Yes
Pallet Pool	6-Station on Documented Machines
Rapid Traverse	2,362 IPM

The MB-4000H combines three linear axes with a full fourth-axis pallet indexing system for multi-sided machining.

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OKUMA MB-4000H 2021 – AXIS TRAVELS / WORK ENVELOPE

Specification	Details
X-Axis Travel	22.05″
Y-Axis Travel	22.05″
Z-Axis Travel	24.61″
Maximum Machining Volume	22.05″ x 22.05″ x 24.61″
Spindle Center to Pallet Top	1.97″ – 24.02″
Spindle Nose to Pallet Center	3.35″ – 27.95″
Maximum Workpiece Diameter	Approximately 23.62″
Maximum Workpiece Height	Approximately 35.43″
Rapid Traverse X/Y/Z	2,362 IPM
Maximum Cutting Feed	Up to 2,362 IPM
Pallet Indexing Resolution	0.001°

The 560 x 560 x 625 mm machining envelope provides a compact but highly productive horizontal machining platform for precision components.

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OKUMA MB-4000H 2021 – CAPACITY

Specification	Details
Pallet Length	15.75″
Pallet Width	15.75″
Pallet Size	400 mm x 400 mm
Maximum Pallet Load	880 lbs
Number of Pallets	6 on Documented Machines
Maximum Workpiece Diameter	Approximately 23.62″
Maximum Workpiece Height	Approximately 35.43″
Pallet Indexing	Full 4th Axis
Indexing Increment	0.001°
Workholding	Tombstones / Fixtures
Tombstones Included	6 on Documented Machine
Fixture Plates	Included on Documented Machine

The six-station pallet pool allows operators to prepare workpieces while other pallets remain in the machining cycle, helping reduce idle time between operations.

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OKUMA MB-4000H 2021 – SPINDLE

Specification	Details
Spindle Type	Horizontal
Maximum Spindle Speed	15,000 RPM
Optional Spindle Speed	Up to 20,000 RPM
Spindle Taper	CAT-40 Big Plus / Configuration Dependent
Standard Spindle Power	Approximately 34–35 HP Peak
Continuous Spindle Power	Approximately 25 HP
Optional Spindle Power	Up to Approximately 40 HP Peak
Spindle Cooling	Thermally Controlled
Through-Spindle Coolant	Available
High-Pressure Through-Spindle Coolant	1,000 PSI on Documented Machines
Spindle Orientation	Yes
Rigid Tapping	Yes

Okuma lists the MB-4000H with a 15,000 RPM spindle and an optional 20,000 RPM spindle configuration. Documented 2021 machines use a 15,000 RPM CAT-40 Big Plus spindle with high-pressure through-spindle coolant.

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OKUMA MB-4000H 2021 – MILLING SPINDLE

Specification	Details
Spindle Orientation	Horizontal
Spindle Speed	50–15,000 RPM
Optional Maximum Speed	20,000 RPM
Spindle Taper	CAT-40 Big Plus
Spindle Power	Approximately 34–35 HP Peak
Continuous Power	Approximately 25 HP
Through-Spindle Coolant	Yes on Documented Machines
Coolant Pressure	Up to 1,000 PSI on Documented Machines
Milling Capability	Yes
Drilling Capability	Yes
Boring Capability	Yes
Tapping Capability	Yes

The horizontal spindle configuration allows chips to fall away from the work area, making the MB-4000H particularly suitable for production machining and deep-pocket applications.

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OKUMA MB-4000H 2021 – TOOL CHANGER

Specification	Details
Standard Magazine Capacity	48 Tools
Optional Tool Capacity	64 Tools
Multi-Magazine Capacity	Up to 218 Tools
Documented 2021 Configuration	146 or 218 Positions
Tool Changer Type	Automatic Tool Changer
Tool Storage System	Matrix / Multi-Magazine Configuration
Maximum Tool Diameter	Approximately 5.91″ on Documented Machine
Maximum Tool Length	Approximately 11.81″ Standard
Extended Tool Length	Up to Approximately 15.75″ on Equipped Machines
Maximum Tool Weight	Approximately 22 lbs
Tool Breakage Detection	Available
Tool Touch Probe	Available

The MB-4000H can be configured with significantly expanded tool storage. Documented 2021 machines include 146-position and 218-position tool changer configurations.

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OKUMA MB-4000H 2021 – CONTROL SYSTEM

Specification	Details
CNC Control	OKUMA OSP-P300 / OSP-P300MA
Control Manufacturer	OKUMA
CNC Type	OSP
Full 4th-Axis Control	Yes
Pallet Pool Management	Yes
Fixture Tracking	Available
Collision Avoidance	Available
Renishaw Probing	Yes on Documented Machines
Tool Measurement	Yes
Tool Breakage Detection	Available
Common Variables	Available
Automation Integration	Yes
Production Monitoring	Supported

The OSP control supports multi-axis machining, pallet management, probing, tool monitoring, and automation functions depending on the machine’s installed options.

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OKUMA MB-4000H 2021 – COOLANT / CHIP MANAGEMENT

Specification	Details
Coolant System	Yes
Through-Spindle Coolant	Yes on Documented Machines
High-Pressure Coolant	1,000 PSI on Documented Machines
High-Pressure Coolant Unit	MP Systems
Shower Coolant	Yes
Splash Gun	Yes
Chip Conveyor	Yes
Documented Conveyor	Mayfran CONSEP 2000
Mist Collector	MP Systems on Documented Machines
Coolant Filtration	Configuration Dependent
Extended Capacity Drain Tank	Available
Automatic Chip Management	Yes

The documented 2021 machine includes a complete production-oriented coolant and chip-management package, including 1,000 PSI through-spindle coolant, shower coolant, mist collection, and a Mayfran CONSEP chip conveyor.

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OKUMA MB-4000H 2021 – POWER REQUIREMENTS

Specification	Details
Electrical Supply	3-Phase Industrial Power
Spindle Motor	Approximately 34–35 HP Peak
Continuous Spindle Power	Approximately 25 HP
Optional Spindle Motor	Up to Approximately 40 HP Peak
Rapid Traverse Motor System	High-Speed Servo
Air Requirement	Required for Machine Operation
Pneumatic System	Industrial Compressed Air
Electrical Configuration	Machine Specific
Installation	Professional Electrical Installation Recommended

Exact voltage and electrical requirements should be confirmed from the machine nameplate and installation documentation for the specific 2021 machine being purchased.

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OKUMA MB-4000H 2021 – DIMENSIONS

Specification	Details
Approximate Length	186″ – 205″ Depending on Configuration
Approximate Width	95″ – 96″
Approximate Height	104″ – 106″
Standard Machine Width	Approximately 95.28″
Standard Machine Depth	Approximately 185.04″
Standard Machine Height	Approximately 104.21″
Approximate Machine Weight	21,000 lbs
Pallet Pool	May Increase Overall Footprint
Chip Conveyor	May Increase Installation Space
Installation	Industrial Floor Required

The machine footprint varies depending on the pallet pool, tool magazine, chip conveyor, coolant equipment, and automation configuration.

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OKUMA MB-4000H 2021 – GENERAL INFORMATION

Specification	Details
Manufacturer	OKUMA
Model	MB-4000H
Year	2021
Machine Type	CNC Horizontal Machining Center
Number of Axes	4
CNC Control	OSP-P300 / OSP-P300MA
X-Axis Travel	22.05″
Y-Axis Travel	22.05″
Z-Axis Travel	24.61″
Pallet Size	15.75″ x 15.75″
Pallet Load Capacity	880 lbs
Pallet Pool	6-Station on Documented Machines
Pallet Indexing	Full 4th Axis
Spindle Speed	15,000 RPM
Spindle Taper	CAT-40 Big Plus
Spindle Motor	Approximately 35 HP
Tool Changer	48–218 Positions Depending on Configuration
Documented Tool Capacity	146 or 218 Positions
Through-Spindle Coolant	Yes
High-Pressure Coolant	Up to 1,000 PSI
Renishaw Probe	Yes on Documented Machines
Chip Conveyor	Yes
Mist Collector	Available / Equipped on Documented Machines
Machine Weight	Approximately 21,000 lbs

The MB-4000H is designed as a high-speed horizontal machining platform that can be expanded with large-capacity tool storage, pallet pools, probing, high-pressure coolant, and other automation equipment.

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INDUSTRIES THAT USE OKUMA MB-4000H

The OKUMA MB-4000H is used in industries that require precision machining, high spindle utilization, multi-sided machining, and automated production. Its horizontal spindle configuration and pallet automation make it particularly suitable for manufacturers producing medium-sized precision components in repeat quantities.

Common industries include:

• Aerospace
• Automotive
• Defense
• Medical Manufacturing
• Hydraulic Equipment
• Industrial Machinery
• Energy
• Oil and Gas
• Semiconductor Equipment
• Automation Equipment
• Heavy Equipment
• Precision Engineering
• General Production Machining

The combination of a six-station pallet pool, fourth-axis indexing, and large-capacity tool storage can allow the machine to support extended production cycles with reduced operator intervention.

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TYPICAL PARTS OKUMA MB-4000H CAN PRODUCE

The MB-4000H can machine components requiring multiple faces to be accessed in one production cycle. The fourth-axis pallet indexing system allows the workpiece to be repositioned automatically for machining on different sides.

Typical parts include:

• Hydraulic valve bodies
• Pump housings
• Gearbox housings
• Transmission components
• Aerospace structural components
• Engine components
• Medical equipment components
• Automotive housings
• Industrial manifolds
• Precision castings
• Aluminum components
• Steel components
• Machine components
• Robotics components
• Fixture plates
• Multi-sided production parts

The horizontal configuration is particularly effective for prismatic components that require milling, drilling, boring, and tapping operations on multiple sides.

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WHY CHOOSE OKUMA MB-4000H

The OKUMA MB-4000H – 2021 offers a combination of high-speed machining, horizontal spindle productivity, thermal stability, and automation capability. The 15,000 RPM spindle, rapid traverse rates of up to 2,362 IPM, and compact 400 mm pallet platform provide a strong balance between speed and machining capacity.

The machine can also be configured with a six-station pallet pool and large-capacity matrix tool changer. A documented 2021 example includes 218 tool positions, full fourth-axis capability, 1,000 PSI through-spindle coolant, Renishaw probing, chip conveyor, and six tombstones. This configuration allows a large number of tools and fixtures to remain available for production without frequent manual intervention.

For manufacturers looking to improve spindle utilization and reduce setup time, the combination of pallet automation, fourth-axis indexing, probing, and large tool storage can make the MB-4000H a productive platform for both high-mix and repeat-production environments.

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WHY BUY USED OKUMA MB-4000H?

Buying a used OKUMA MB-4000H – 2021 can provide access to a modern horizontal machining center with advanced automation and production capabilities at a lower capital investment than a new machine. Because the MB-4000H can be equipped with pallet pools, large-capacity tool changers, probing, high-pressure coolant, and chip-management systems, the value of a used machine depends heavily on its installed equipment.

A well-equipped used 2021 MB-4000H may include:

• OSP-P300 or OSP-P300MA CNC control
• 15,000 RPM CAT-40 Big Plus spindle
• Full fourth-axis pallet indexing
• Six-station pallet pool
• 64, 146, or 218-position tool changer
• 1,000 PSI through-spindle coolant
• Renishaw spindle probe
• Tool touch probe
• Tool breakage detection
• Mayfran chip conveyor
• MP Systems high-pressure coolant unit
• Mist collector
• Shower coolant
• Splash gun
• Extended tool length capability
• Tombstones and fixture plates
• Collision avoidance
• Fixture tracking
• Extended lubrication capacity

Documented 2021 machines have varied substantially in hours and configuration, with examples reporting approximately 4,200 cutting hours, 8,529 cutting hours, and more than 9,000 spindle hours at different reporting dates. This makes the inspection of the individual machine especially important.

Before purchasing a used MB-4000H, buyers should inspect spindle condition, pallet changer operation, fourth-axis indexing, tool changer operation, probing systems, ballscrews, linear guideways, coolant system, chip conveyor, control condition, machine hours, and maintenance history. A machine inspection under power and, when possible, a test cut can provide additional information about the machine’s current condition.

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HOW MUCH DOES A USED OKUMA MB-4000H COST?

The price of a used OKUMA MB-4000H – 2021 varies significantly based on machine hours, spindle condition, pallet automation, tool changer capacity, probing equipment, coolant system, and included workholding. A six-pallet machine with a 218-position matrix tool changer and high-pressure coolant represents a substantially different package from a standard two-pallet configuration with a smaller tool magazine.

Several current or recent listings for 2021 machines are available on a request-for-price basis, rather than with a publicly listed asking price. One documented 2021 system was described as having a replacement cost of more than $575,000 when equipped with its six-station pallet pool, 218-position tool changer, high-pressure coolant, probing, and other accessories, although replacement cost is not the same as used-market value.

Because publicly available fixed asking prices for comparable 2021 MB-4000H machines are limited, the used-market value should be evaluated individually based on the exact configuration. The pallet pool, tool capacity, spindle hours, high-pressure coolant system, probing, tombstones, workholding, and maintenance history can all materially affect the purchase price.

For buyers evaluating a used OKUMA MB-4000H, comparing complete machine packages rather than model year alone is especially important, since a 2021 machine with a six-station pallet pool and 218 tools can have considerably different production capability and value from a similarly aged machine with a standard pallet changer and smaller tool magazine.